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(No Model.)

o" @unaniem l "l Patented Nov. 29, |898. L. W. CARROLL &. F. B.WENTWORTH.

L A M P (Application led Dec. 27, 1897.)

Ilumlllllllllllll III WIIH NITED STATES.

PATENT Erica.

LOUIS YV. CARROLL AND FRANK B. WENTWORTH, OF SUMNER, IOWA, ASSIGNORS, BYMESNE ASSIGNMENTS, TO JACKSON FITZ RANDOLPH,

OF CHICAGO, ILLINOIS.

LAM P.`

SPECIFICATION forming part of Letters Patent No. 615,138, dated November29, 1898.

Application iiled December 27, 1897. Serial NoJ 663,453. (N0 model-l To@l whom it may concern:

Be it known that we, LOUIS WV. CARROLL and FRANK B. WENrwoRTH, citizensof the United States, residing at Sumner, in the county of Bremer andState of Iowa, have invented certain new and useful Improvements inLamps; and we do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

The invention relates to lamps for burning kerosene in whichillumination is secured by the incandescence of a non-combustiblemantle.

The objects of the invention are to secure perfect combustion andimproved means for adjusting and securely holding together the parts ofthe lamp.

The invention consists in the various parts and arrangement of partshereinafter described,and shown in the accompanying drawings, in which-Figure lis an elevation of our improved lamp, the shade being shown insection. Fig. 2 is a central vertical section of the burner. Fig. 3 is asectional view on the line 3 3 of Fig. 2. Fig. 4 is an elevation, partlyin section, of an adjunct of a Bunsen burner used in the lamp; and Fig.5 is a plan View of the part shown in elevation in Fig. 4.

The bowl or fount A is without novel features. It is provided withconcentrically-arranged wick-tubes B C, forming an annular space for theaccommodation of a tubular wick. Any suitable wick-elevating device maybe used. The ordinary rotating spindle a is shown in the drawings. Theouter tube B is prolonged above the upper end of the tube C a shortdistance, and within the end of the tube C is fitted a plug G, fromwhich rise a plurality of radiating blades F, having near their lowerends outstanding shoulders f. A Bunsen tube D its over the blades F andis supported upon the shoulders f, so that a narrow annular port isformed between its lower end and the top of the plug G. The

tube D is provided with air-ports d, which are as numerous or of sucharea as may be necessary to properly support combustion, and these portsare located below the upper ends of the blades F, which are bent ordeflected laterally, as shown at f', for the purpose of giving theascending currents a rotary 1notion,to the end that the vapors may bethoroughly mixed before they issue from the upper end of the tube D,where they burn with a blue flame typical of the Bunsen burner.

The upper ends of the wick-tubes and the Bunsen tube are inclosed by acasing M, which is without perforations except as to thelighting-aperture m,which may be closed by a band O, encircling thecasing. A gallery E forms the top of the casing M and fits tightly aboutthe upper end of the tube D and is also without perforations.

A non-combustible gauze mantle H is mount ed above and incloses the endof the tube D, so that flame issuing from the upper end of the latterwill cause the incandescence of the mantle. An inclosing chimney J, ofglass, rests upon the gallery E and is surmounted by a metal chimney Kof suicient length to insure ample draft to promote combustion. Thesechimneys are held in place by elastic arms 7c in bow form, permanentlyattached at their lower ends to the casing M and at their upper ends tothe metal chimney K. The chimney J is adjusted to the lamp by drawingupwardly upon the chimney K, so as to raise it against the resistance ofthe spring-arms lc, Which when the parts are adj usted draw the upperchimney down firmly upon the lower one.

The burner may be secured to the fount in any desired manner. W'e showas a means of attachment a flange P, projecting radially from the tube Band engaging the lower end of the casing M by the Well-knownbayonetpoint form of attachment. The flange Pis perforated, as shown atp, so that all of the air used by the lamp nds en trance to the burnerthrough the bottom of the casing M.

The wick X is raised only to the top of the tube C. The tube B,extending upwardly beyond the top of the wick, incloses it as a Walland, With the tube I), forms an annular IOO combustion-chamber, to whichair is admitted only at the top. This supply of air is too small forcomplete combustion, and most of the vapor distilled escapes from theflame unburned. The suction due to the flame at the top of the tube D issufficient to draw into the latter all of this unburned vapor andsufficient air through the ports (l to insure complete combustion as themixture issues from the tube. rlhe velocity at which the vapor and airpass the bent ends of the blades F is such that they are caused to swirland become thoroughly intermixed.

For convenience in lighting, the chimney K is provided with an apertureq in its lower end, and this aperture may be covered by a band Q,encircling and sliding upon the chimney. As the casing M is entirelywithout perforations, there is no escape ot unburned vapors when thelamp is first lighted, and as the gallery E is without perforationsthere are no counter-currents of air outside of the mantle, which wouldtend to disturb the fiame within it.

lVhile we show our invention as relating particularly to a lamp, its`form of burner used is equally serviceable for heating purposes and maybe readily adapted for use in connection with oil-stoves.

In lighting the lamp the aperture m is opened and the wick turned upsufficiently so that a match may be applied to it when inserted throughthis aperture, and it is then turned down below the annular port at thebase of the tube D. The aperture q being opened,a lighted match maybeinserted therein,and the ascending vapors,eseaping through the mantle,will immediately ignite. The de gree of illumination maybe controlled byraising and lowering the wick. The upwardlyextending end of the tube Bprevents the access ot air to the flame, so that the combustion is quiteincomplete. By locating the airports of the burner-tube above thevapor-induction port the air is directed thereto and prevented frombeing drawn down into the vapor-port in greater quantity than is required for the purpose in view.

lVe claim as our inventionl. The combination with a wick-tube andflame-chamber at the top thereof, of a Bunsen burner rising from theflame-chamber and having its lower end open only thereto, and havingair-ports above the flame-chamber.

2. The combination with a wick-tube and flame-chamber at the topthereof, of a Bunsen burner rising from the inner tube and having itslower end open only to the flame-chamber, and having air-portsintermediate of its ends.

I3. The combination with a pair of concentric wick-tubes, the outer tuberising above the inner tube, of a Bunsen tube rising from the innerwick-tube and having vapor-induc tion ports at its lower end.

l. The combination with a pair of concentric wick tubes, the outer tubeextending above the inner tube, of a Bunsen burner rising from the innertube and having its lower end open only to the chamber inclosed by theupper end of the outer wick-tube.

5. In a hydrocarbon-lamp, the combination with a bowl or fount and awick-tube rising therefrom, of an imperforate easin g inclosing the topof the wick-tube and being open only above the position at whichcombustion is to be maintained, and a Bunsen tube having its lowerend'open to the chamber of the case, but otherwise eut of't from theatmosphere.

(3. The combination with a pair of. concentric wick-tubes, the outertube rising above the inner tube, of a unsen tube rising from the innerwick-tube and having vapor-induetion ports at its lower end andair-induction ports above the vapor-ports.

7. The combination with a pair of concentric wick-tubes, ot' aBunsen-burner tube rising from the upper end of the inner wicktube andhaving vapor-induction ports at its lower end, and an imperforate caseinelosing the upper ends of the wick-tubes and the ported portion of thevapor-tube, and being open at its lower end.

S. The combination with a Bunsen burner, of a plurality of longitudinalpartitions radiating from its anis and located in its receiving end, theforward ends of such partitions being laterally deflected.

9. The combination with a pair oi' concentric wick-tubes, of a plugfitting the upper end of the inner tube, a plurality of radiating bladesrising from the plug and having their upper ends oblique to the axis ofradiation, and a Bunsen tube inelosing the blades and being of lessdiameter than the outer wick-tube, and having a port at its lower endand air-induction ports between its lower end and the upper ends of theblades.

10. In avapor-burnerof the type described, the combination with aburner-tube, of an imperforate gallery radiating from the tube, and animperforate chimney rising from the galleryand making therewith asubstantially air-tight joint.

In testimony whereof we affix our signatures in presence ot' twowitnesses.

LOUIS lV. CARROLL. FRANK 13. VEN'NVORTIT. lVitnesses:

M. RoBIsH,

`nto. G. KoEnnRLn.

IOO

IIO

